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4Wd Light On

liammph-uk

By liammph-uk,
in Four Door Family & Wagoneers

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liammph-uk Contributor

liammph-uk

Posted
Posted

Just had the car remapped (drives so much better now) but the 4wd light has come on and we can't work out why. As far as I know the 4wd is controlled by a separate ecu, at least it is in the Skyline, so I was presuming it's still the case in the Stagea? This is on a series 1 rs4 that's had a manual gearbox conversion. Not had a problem with the 4wd system before, any help would be appreciated.

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liammph-uk Contributor

liammph-uk

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Posted

No gone for the Link G4 ecu.Don't think anything that was done would have affected the throttle position sensor, how would that affect the 4wd?

Yeah could be coincidence, but the light came on as soon as the new ecu was plugged in.

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MikeH Contributor

MikeH

Posted
Posted

I have the same problem. Well sort of anyway.

My 4wd light comes on probably 8/10 times I drive the car. Sometimes straight away, some times not at all... I have the rs4s with a 'mines' ecu.

I am putting a new set of wheels on this Friday and getting a wheel alignment so if that doesn't fix it (doubt it will) then further investigation is needed.

I am keen to see if there is known problems that cause this as well.

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mely1200 Explorer

mely1200

Posted
Posted

Hey mate,

Was it tuned on a 2wd dyno? Might have clutch pack problem if you did...

Can you jack it up so all 4 wheels are off the ground? If you can, spin the rear wheels. If the front wheels turn as you do, you still have pressure in the ATTESA system. If not, you might be in strife. Best case, the clutches took a beating but are ok and you just need to get some more fluid in the system, check the reservoir in the drivers side rear.

I have the R33, R34 GTR service manual if you can get access to a consult box; it will tell you whats going on...

good luck, pm me if you need anything.

m

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  • 3 weeks later...
XKLABA Grand Master

XKLABA

Posted
Posted

Ayvon, if your car is the R33 GTR, it's pin 56

http://www.skyline-owners-club.com/forums/showthread.php?t=22456

Link/ViPec and some other computers "share" the TPS signal from the TPS sensor instead of relying it which inturn lowers the voltage at the various control units, the 34 feels it the most because of the MFD, this is an issue I'm having at the moment and the cure, for me atleast, is a buffer to up the voltages back to correct levels

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Abe2 Experienced

Abe2

Posted
Posted

stagea rs4s s2 run the 25neo
i have replaced factory ecu now im having intermittent 4wd issues im trying to figure out what pinout / wire was suplying the 4wd ecu with tps signal
at this point i was going to t it off straight from tps

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  • 2 weeks later...
XKLABA Grand Master

XKLABA

Posted
Posted

MFD, Multi Function Display, R34 GTR

where are located ?, I have a guy making me a voltage chaser, basically it takes a high imp input and puts out a low imp out put so it can supply the right signal voltage for more things to use, on mine I'm going to cut it in to the wire leaving the ecu, he made me a PWM switching unit for my fuel pump and it works perfectly

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